2.99.7: (unstable) * connection, slot_base: Use an internal::weak_raw_ptr<> to simplify the code. (Murray Cumming) * signal_base: Do not derive from trackable. (Murray Cumming * slot_rep: Pass a slot_rep*, not notifiable*, to destroy(). (Murray Cumming) * signal_impl: Do not derive from notifiable. (Murray Cumming)